what is brightness. help asap

Answer:

This difference is kept to a minimum because the resistance in transformers is a few tens of ohms and the resistance of modern voltmeters is of the order of MΩ.

Explanation:

A voltmeter is built by a galvanometer and a resistance in series, this set is connected in parallel to the resistance where the voltage is to be measured, therefore the voltage is divided between the voltmeter and the element to be measured, consequently the measured voltage It is less than the calculated one, since for them the resistance of the voltmeter is assumed infinite.

This difference is kept to a minimum because the resistance in transformers is a few tens of ohms and the resistance of modern voltmeters is of the order of MΩ.

The speed the golf must have initially to reach the hole is 31.32`1 m/s.

When an object is thrown at an angle from the horizontal direction, the object is said to be in projectile motion. The object which follows the projectile motion.

A golfer wishes to chip a shot into the hole 50m away on flat level ground. if the ball flies to a maximum height of 25m.

The angle with which the ball flies,

tan θ = 25 m/ (50m/2)

tan θ =1

θ  =45°

If u is the initial speed, the maximum height of the ball is

H = u² sin²θ / 2g

Put the values, we get

25 =  u² sin²45 / (2x9.81)

u = 31.321 m/s

Thus, the initial speed is 31.321 m/s

Learn more about projectile.

brainly.com/question/11422992

#SPJ1

False. In the vertical direction, the ground reaction force is the effective force.

In the vertical direction, we can say that the ground reaction force is the force exerted by the ground on an object in contact with it.

In addition, the vertical forces are the type of force that act in the vertical direction of a motion while the horizontal forces are the type of forces that act in the horizontal direction,

The vertical forces are subjected to the effect of gravity, while the horizontal forces are not subject to force of gravity.

Thus, in the vertical direction, the ground reaction force is NOT the effective force.

So the statement if False.

Learn more about vertical direction here: https://brainly.com/question/2534565

#SPJ4

Answer:

156,800 N

Explanation:

Given: Width = 2.0 m Length = 4.0 m Depth =  2.00 cm. Density of water = 1000 Kg/m³

To find: What is the weight of the truck?

Formula: \(F = m\) × \(9.8 m/s^2\)

Solution: Weight is a measure of the force of gravity pulling down on an object. It depends on the object's mass and the acceleration due to gravity, which is 9.8 m/s² on Earth. F is the object's weight in Newtons (N) and m is the object's mass in kilograms.

Firstly, multiply the length, width, and depth.

\(2.0\) × \(4.0\) × \(2.00\) \(= 16\)

Next, the weight of the truck is found by multiplying the density of water, the result found by multiplying the length, width, and depth, and the formula;

\(1000 kg/m^3\) × \(16\) × \(9.8m/s^2\)\(= 156,800\)

Therefore, the weight of the truck is 156,800 N

Answer: D. Increasing in randomness.

Explanation: The concept related to this change is entropy. Entropy is a measure of the randomness or disorder in a system. According to the second law of thermodynamics, the entropy of an isolated system tends to increase over time. This means that natural processes often lead to an increase in randomness or disorder.

For example, imagine a container of gas molecules. Initially, the molecules may be confined to one side of the container, creating a region of higher concentration. However, over time, the gas molecules will naturally spread out and become more evenly distributed throughout the container. This increase in randomness or disorder corresponds to an increase in entropy.

Given:

The given value is \((1.0004)^{\frac{1}{2}}\).

To find:

The value of the given expression by using the Binomial approximation.

Explanation:

We have,

\((1.0004)^{\frac{1}{2}}\)

It can be written as:

\((1.0004)^{\frac{1}{2}}=(1+0.0004)^{\frac{1}{2}}\)

\((1.0004)^{\frac{1}{2}}=1+\dfrac{1}{2}\times 0.0004\)      \([\because (1+x)^n=1+nx]\)

\((1.0004)^{\frac{1}{2}}=1+0.0002\)

\((1.0004)^{\frac{1}{2}}=1.0002\)

Therefore, the approximate value of the given expression is 1.0002.

Grains, pasta, etc provides the body with energy in the form of carbohydrates because they're absorbed quickly by the body and used for energy.

Answer:

Velocity is the rate at which an object changes position

Answer: Periods

Explanation: The rows are called Periods

The columns are Groups

Periodic table

When laser light is used to repair a tear in the retina, it is important for the rays entering the eye to be parallel. This is primarily because of the focusing properties of the eye.

The human eye has a lens that is responsible for focusing light onto the retina, located at the back of the eye. The lens refracts or bends incoming light rays so that they converge onto a small spot on the retina, forming a sharp image. This process is known as accommodation and is crucial for clear vision.

If the rays of light entering the eye are not parallel, they will converge or diverge at different angles, causing the image to be distorted and unfocused on the retina. In the case of repairing a tear in the retina, it is essential to precisely target and apply the laser at the desired location on the retina.

By using parallel laser beams, the light rays maintain a consistent direction and angle as they pass through the eye. This allows the laser to be focused accurately onto the specific area of the retina that requires treatment. The parallel beams ensure that the laser energy is concentrated and delivered precisely, minimizing the potential for collateral damage to surrounding tissues.

Therefore, to achieve effective spot-welding of the retina during the repair procedure, the use of parallel laser light ensures precise and controlled delivery of energy to the targeted area.

To learn more about laser visit: https://brainly.com/question/24354666

#SPJ11

Answer:

μ = 0.55

Explanation:

Given:

m = 43 kg

a = 0.79 m/s²

F pull = 265 N

_____________

μ - ? Friction coefficient

2 Newton's law:

m·a = Fpull  - μ·m·g

μ·m·g = Fpull - m·a

Friction coefficient:

μ = (Fpull - m·a) / (m·g)

μ = (265 - 43·0.79) / (43·9.8) ≈ 0.55

Answer:

C . 3.75 Ohms

Explanation:

V = IR

R = V / I

From the graph, you pick a value for potential difference and find its corresponding current.

The resistance of the wire in Ohms is 3.75 Ω, therefore the correct answer is option C

Resistance is the obstruction of electrons in an electrically conducting material.

The mathematical relation for resistance can be understood with the help of the empirical relation provided by Ohm's law.

V=IR

where V is the voltage

I is the current

From the voltage-current  graph, one can know the resistance by calculating the slope of the graph

As shown in the graph the variation of the voltage with the current

Y axis represents the voltage and the X axis represents the current

slope = variation in the Y coordinate /variation in the X coordinate

resistance = variation in the voltage /variation in the current

                 = (30 - 0 )/ (8-0 )

                 = 3.75 Ω

Thus, by observation and calculation from the graph, the resistance of the wire comes out to be 3.75 Ω

Learn more about resistance, here

brainly.com/question/14547003

#SPJ2

Answer:

i) Power = Force * Velocity = 1100 * 15 = 16500 W = 16.5 kW(ii)  Find the value of k first: F = 400 + k(15^2)                                              k = 28/9    F = 400 +(28/9)(30^2) = 320

Explanation:

Conservation of momentum

Pix = Pfx

m1= Archer's mass = 102.3 kg

v1 = Archer's velocity =

m2 = arrow's mass = 99g = 0.099 kg

v2f= arrow's velocity = 104.2 m/s

0= m1 v1 + m2 v2

V1= -( m2/m1) v2

V1 = - (0.099 kg /102.3 kg) *104.2 m/s

V1= - 0.1008 m/s

Explanation:

120+ 120 = 240 miles divided 1 hours 20 seconds

For the given acceleration and time, following are the different velocities.

Given:

acceleration  a = 4 m/s²

time  t = 3 sec

initial velocity  u = 0 [ starts from rest ]

let final velocity be = v

Therefore according to the question,

velocity after 1 sec :

v = u + at

v = 0 + 4 x 1

v = 4m/s ( after 1 sec)

Velocity after 2 secs

v = 0 + 4 x 2

v= 8m/s (after 2 sec)

Velocity after 3 secs

v = 0 + 4 x 3

v = 12m/sec

To learn more about Velocity click on the link below:

https://brainly.com/question/24681896

#SPJ9

To answer these questions, we need to recall the definitions of work and power. Work is the product of force and displacement in the direction of the force. Power is the rate of doing work. The force of gravity is the weight of the object, which is equal to its mass times the acceleration due to gravity. The displacement is the vertical distance that the object moves.

The work done by you on the package is given by:

where F is the force you apply, d is the displacement, and theta is the angle between the force and the displacement. Since you lift the package vertically, theta is zero and cos(theta) is one. Therefore,

The force you apply must be equal to or greater than the weight of the package, otherwise it would not move upward. Assuming you apply a minimum force equal to the weight of the package, we have:

where m is the mass of the package and g is the acceleration due to gravity. Plugging in the given values, we get:

The power needed to move the package is given by:

where W is the work done and t is the time taken. Plugging in the values, we get:

The work done by gravity on the package is given by:

where F_g is the force of gravity, d is the displacement, and phi is the angle between gravity and displacement. Since gravity acts downward and displacement is upward, phi is 180 degrees and cos(phi) is -1. Therefore,

The force of gravity is equal to the weight of the package, so we have:

Plugging in the values, we get:

Since the work done by gravity on the package is negative, it means that gravity does negative work on the package.

Gravity is a natural phenomenon whereby everything that has mass or energy in the universe—including planets, stars, galaxies, and even light—attracts one another.

Learn More About Gravity at https://brainly.com/question/940770

#SPJ11

Between points a and b, an automobile moves in a straight line. the two sites are 550.0 meters apart, and the speed is 50.0 meters per second with an acceleration of 30 miles per hour.

The pace at which speed changes is known as acceleration. Because the path of an object's velocity is shifting even while it follows a circular course, it continues to accelerate.

The three main categories of accelerated motions are uniform, non-uniform, and average acceleration. When an item moves in a straight path with an increase in speed occurring at regular intervals of time, this motion is referred to as having uniform acceleration.

To know more about acceleration visit:

https://brainly.com/question/3046924

#SPJ4

Answer:

it reduces friction

Explanation:

if you put oil or any liquid between the tool it will shift and change the shape as much as it needs to. It will smooth the bumps between the tools gears as they squeeze together making the friction reduce. It will slide and that reduces the friction.

i hope this helps im lowkey just guessing tho so sorry if it doesnt. lmk tho

Answer:

A big wheel with triple the circumference of a small wheel will rotate with triple the force.

Explanation:

Answer:

because it is less dense than the surrounding air

Explanation:

Answer:

i dont understand sorry

Answer:

225

Explanation:

Answer:

I am doing the test now let me make sure then I tell you ok, just a second..

225 is correct

Explanation:

Real gases behave non-ideally at very low temperatures and very high pressures because the ideal gas equation doesn't consider the volume of gas molecules and intermolecular forces.

Real gases are different from ideal gases in many ways. They are not completely empty, and they have some mass. The pressure exerted by real gases is not always constant because the volume of their particles is not negligible. Real gases also have intermolecular forces that can affect their behavior. Real gases' behavior can be predicted using the van der Waals equation. This equation accounts for the volume of the gas molecules and the attractive forces between them. It is given by:

(P + n²a/V²) (V-nb) = nRT,

where P is the pressure, V is the volume, T is the temperature, n is the number of moles of gas, R is the gas constant, a and b are the van der Waals constants, which depend on the gas.

To know more about the "ideal gas equation": https://brainly.com/question/20348074

#SPJ11

Explanation:

ttggffgggggtttggcasvsydjx

Let's call the length of the race track as "x".

To solve for "x", we can use the formula:

\(\implies\text{ Time} = \dfrac{\text{ Distance}}{\text{ Speed}}\)

Since the race ends in a tie, we know that Jan and Mary both took the same amount of time to run the race. Let's call this time "t".

\(\implies \text{ Time} = \dfrac{\text{ Distance}}{\text{ Speed}}\)

\(\implies t = \dfrac{x - 25}{7.5}\)

\(\implies\text{ Time} = \dfrac{\text{ Distance}}{\text{ Speed}}\)

\(\implies t = \dfrac{x}{8.0}\)

Since both expressions represent the same time, we can set them equal to each other and solve for "x":

\(\implies \dfrac{x - 25}{7.5} = \dfrac{x}{8.0}\)

Multiplying both sides by 60 (the least common multiple of 7.5 and 8.0) to get rid of the decimals:

\(\implies 8(x - 25) = 7.5x\)

\(\implies 8x - 200 = 7.5x\)

\(\implies 0.5x = 200\)

\(\implies x = 400\)

\(\therefore\) The length of the race track is 400 meters.

\(\blue{\overline{\qquad\qquad\qquad\qquad\qquad\qquad\qquad\qquad\qquad\qquad\qquad\qquad\qquad\qquad\qquad}}\)

Answer:

Isn't it technically your brain? Because it's always in your skull and when you're younger you have cracks in your skull but as you grow, your skull fossilizes to mend those cracks. IT FOSSILIZES!

Explanation:

The term you are looking for is "chemical battery". Chemical batteries work by converting chemical energy into electrical energy through a series of chemical reactions. These reactions take place within the battery's cells, which are composed of two electrodes and an electrolyte.

When the battery is connected to a circuit, the chemical reactions produce an electrical current that can be used to power devices. Chemical batteries are widely used in many applications, including consumer electronics, electric vehicles, and renewable energy systems. They are a crucial component of our modern technological society, and ongoing research is focused on developing more efficient and sustainable battery technologies to meet growing energy demands.

To know more about electrical energy visit :-

https://brainly.com/question/16182853

#SPJ11